Way to make this forum as stereotypical as every other gun forum on the net.
M16 (as long as it is a newer design of today, no Vietnam crap) wins my vote. AKs are too clunky and ugly. Penetration and power are good but I think a better aimed shot is more important than how many powerful round you can spit out. Marksmanship is an art, spray and pray is like modern art.